These contouring line I guess Topography related are always tough. Although I am not ought to learn it ..THANK GOD:D.. I am at a verge of completing my Architecture Degree. But when I saw DWG name that Autocad stuff just attracted me towards your blog.
Indeed the way you compose the blog is appreciable. I must learn these Talent.
Just Followed you, Now you will find me in all of your comment section in future:)